Machine for molding artificial stone.



PATENTBD JULY 12, 1904.

N. P. PALMER.k MACHINE FOR MOLD-ING ARTIFICIAL STONE.

1 APPLICATION FILED JAN. 21. 190A.V

N0 MODEL.

Patented July 12, 1904.

PATENT OEEieE.,

NOYES F. PALMER, OF NET YORK, N. Y.

MACHINE FOR IVIOLDING ARTIFICIAL STONE.

SPECIFICATION forming part of Letters Patent No. 764,623, dated July 12, 1904.

Application filed January 2l, 1904. Serial No. 189,956. (No model.)

Beit known that l, Novus F. PALMER, a citi- Zen of the United States, residing at New York city, Brooklyn, county of Kings, and State of New York, have invented new and useful Improvements in Machines for Molding Artificial Stone, of which the following is a specilication.

This invention relates to an improved machine for molding artificial stone, the machine being so constructed that the weight of the product may be readily changed.

In the accompanying drawings,` Figure lis a plan of my improved machine for molding artificial stone with the platen removed; Fig. 2, a vertical longitudinal section thereof,show ing the molded stone raised; and Fig. 3, a cross-section on line 3 3, Fig. l.

The letter c represents the base-plate, and 7) represents the sides of a mold that may be opened or closed in suitable manner. The hase-plate a has a central opening for accommodating a vertically-movable core-plate c, upon which a suitable number of tapering cores fl, having closed tops, are ad `iustably mounted. In order to secure the cores ad j ustably upon the plate c, the latter is provided with a longitudinal slot c, adapted for the reception of bolts c. These boltsextend through upright perforations of the cores and carry countersunk nuts c. By loosening the nuts and shifting the bolts within the slot c the position of the cores may be readily changed.

vWithin the mold there is placed a false bottom or platen f, which is adapted to lift the green block out of the mold. This platen may be moved in a direction opposite to that of the core-plate c by any suitable mechanism. The drawings show the platen to be engaged by toothed lifters g, passing through openings a' of base-plate fl. and driven by gearwheels t. Upon the axle /r of one of the wheels L is mounted a second gear-wheel c', engaging a rack fr', which is attached to corcplate c.

By the machine as thus far described a block having an opening corresponding to the size of the core (Z may be molded. 1t is, ho\ ever, frequently desired to increase the hollow of the block in order to adapt the block to lighter work. In order to set the machine to mold such lighter blocks without removing the cores (Z, I have devised the followingconstruction: Concentrically to each core (Z I iit upon the base-plate fr a hollow tubulaitapering shell j, which is open at the top and bottom. The bore of the shell conforms to the contour of the core, the drawings, Fig. l, showing the core and the shell to be of oval form in cross-section. The circumference of the shell is, however, eccentric to its bore, it being shown to be circular. In this way the side of the shell gradually increases in thickness from two diametrically opposite points toward the two'intermcdiate opposite points. The thickened sections of the shell are provided with upright perforations adapted for the accommodation of bolts 7c, carrying counter-sunk nuts k. The bolts 7c engage parallel longitudinal slots c2 of base-plate a, and thus by loosening the nuts the position of the shell-sections may be adjusted to conform to the position of the cores (Z. If it is desired to subdivide the molded block by means of interior partitions m, each shell 7' is made of two detached semitubular sections which are slightly separated from each other in order to accommodate the partitions.

If it is desired to mold a block with a small opening, the shells 7' are removed. lf, however, larger openings arc desired, the shells j' are bolted to the bed-plate c, concentric to the cores. The machine is'then operated in the usual manner, the cores (Z in rising entering the shells, so as not to interfere with the molding of the block. In fitting the shells to the bed-plate the cores are first raised to constitute centering devices for the shells. Thus the configuration of the block will be maintained, while its openings will be enlarged. The top of the cores when raised, as well as the top of the shells, must be flush with the top of the mold. Hence the shells must be open on top to accommodate the cores.

the shells are in position, the cores being closed on top will close the shells and prevent the surplus from dropping into the shells while the block is being struck off.

What l claim is- In a machine for making artificial stone, the

l/Vhen K IOO Combination of a mold having a perforated Signed by me at New York city, Manhatbase-plate, with a tapering open shell mounttan, New York, this 20th day of January, 1904. ed thereon, a vertically-movable core-plate, NOYES F' PALMER' and a Closed tapering" core mounted upon said 5 plate, and adapted to be projected through Witnesses:

the perforated buse-plate into said shell, sub- WILLIAM SCHULZ, stantially as described. FRANK V. BRIESEN. 

